How do we know that matter in the early universe was extremely smooth (i.e. ,not really lumpy)?
A) Because the cosmic background radiation is almost completely isotropic
B) Because,at the present time,galaxies are spread almost completely uniformly through the universe
C) Because quasars are spread almost completely uniformly around the sky
D) Because the expansion of the universe is almost completely isotropic

Question

Quizplus · Accepted Answer

The cosmic background radiation is almost completely isotropic, meaning that it has a very uniform temperature distribution. This indicates that matter in the early universe was also very smooth and uniform, with only slight fluctuations that led to the formation of galaxies and other structures over time.

How Do We Know That Matter in the Early Universe